old Cygwin.
	* file.c (rb_file_truncate): added prototype of GetLastError()
	  on cygwin.  [ruby-dev:31239]
	* intern.h (is_ruby_native_thread): prototype.
	* missing/strftime.c (strftime): fix printf format and actual
	  arguments.
	* ext/Win32API/Win32API.c (Win32API_initialize): ditto.
	* ext/tk/tcltklib.c (ip_finalize): ditto.
	* ext/dl/ptr.c (rb_dlptr_inspect): ditto.  [ruby-dev:31268]
	* ext/dl/sym.c (rb_dlsym_inspect): ditto.
	* ext/socket/getnameinfo.c: include stdio.h always.
	* ext/win32ole/win32ole.c (ole_hresult2msg, folevariable_name,
	  folevariable_ole_type, folevariable_ole_type_detail,
	  folevariable_value, folemethod_visible): missing return value.
	


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_5@13034 b2dd03c8-39d4-4d8f-98ff-823fe69b080e